scholarly journals Assessment of Geostatistical Models for the Major Soil Nutrients for Tumkur District of Karnataka, India

2019 ◽  
Vol 8 (4) ◽  
pp. 9382-9387
Keyword(s):  
Soil Fertility ◽  
Soil Nutrients ◽  
Ordinary Kriging ◽  
Agricultural Sector ◽  
Soil Nutrient ◽  
Soil Test ◽  
Soil Fertility Management ◽  
Distance Weighted ◽  
Geostatistical Models ◽  
Interpolation Techniques

Digitization of agriculture has tremendously increased in the adoption of various advanced techniques in the Indian agricultural sector. One of the core agriculture objectives is preserving soil fertility. To achieve this efficient soil fertility management alongside an effective spatial distribution of soil nutrient properties is required. The main objective of this study is to evaluate and propose the best interpolation technique on estimating the soil nutrients status to provide site-specific fertilizer recommendations through the Soil Test Crop Response target yield approach. In this study, we have focused on three major soil nutrients viz., nitrogen (N), phosphorus (P2O5) and potassium (K2O) for evaluation. The benchmarking study has considered four most successive interpolation techniques like Ordinary Kriging (OK), Radial Basis Function (RBF), Inverse Distance Weighted (IDW), and Global Polynomial Function (GPI). The evaluation and analytical results proved Ordinary Kriging is better by securing the highest accuracy against other interpolation techniques concerning RMSE and ME for interpreting the soil nutrients N, P2O5, and K2O. The interpreted values are also cross-validated with actual soil test samples with an accuracy of more than 85% for each nutrient. Nevertheless, these results are dependent on the number of actual soil test samples and the accuracy of the designed network with overall accuracy between the interpreted and the actual data.

scholarly journals Assessment of Potato Farmland Soil Nutrient Based on MDS-SQI Model in the Loess Plateau

2021 ◽  
Vol 13 (7) ◽  
pp. 3957
Author(s):  
Yingying Xing ◽  
Ning Wang ◽  
Xiaoli Niu ◽  
Wenting Jiang ◽  
Xiukang Wang
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Fertility ◽  
Soil Quality ◽  
Soil Nutrients ◽  
Organic Matter Content ◽  
Soil Nutrient ◽  
Matter Content ◽  
Soil Organic Matter Content ◽  
Farmland Soil

Soil nutrients are essential nutrients provided by soil for plant growth. Most researchers focus on the coupling effect of nutrients with potato yield and quality. There are few studies on the evaluation of soil nutrients in potato fields. The purpose of this study is to investigate the soil nutrients of potato farmland and the soil vertical nutrient distributions, and then to provide a theoretical and experimental basis for the fertilizer management practices for potatoes in Loess Plateau. Eight physical and chemical soil indexes were selected in the study area, and 810 farmland soil samples from the potato agriculture product areas were analyzed in Northern Shaanxi. The paper established the minimum data set (MDS) for the quality diagnosis of the cultivated layer for farmland by principal component analysis (PCA), respectively, and furthermore, analyzed the soil nutrient characteristics of the cultivated layer adopted soil quality index (SQI). The results showed that the MDS on soil quality diagnosis of the cultivated layer for farmland soil included such indicators as the soil organic matter content, soil available potassium content, and soil available phosphorus content. The comprehensive index value of the soil quality was between 0.064 and 0.302. The SPSS average clustering process used to classify SQI was divided into three grades: class I (36.2%) was defined as suitable soil fertility (SQI < 0.122), class II (55.6%) was defined as moderate soil fertility (0.122 < SQI < 0.18), and class III (8.2%) was defined as poor soil fertility (SQI > 0.186). The comprehensive quality of the potato farmland soils was generally low. The proportion of soil nutrients in the SQI composition ranged from large to small as the soil available potassium content = soil available phosphorus content > soil organic matter content, which became the limiting factor of the soil organic matter content in this area. This study revolves around the 0 to 60 cm soil layer; the soil fertility decreased gradually with the soil depth, and had significant differences between the respective soil layers. In order to improve the soil nutrient accumulation and potato yield in potato farmland in northern Shaanxi, it is suggested to increase the fertilization depth (20 to 40 cm) and further study the ratio of nitrogen, phosphorus, and potassium fertilizer.

scholarly journals Factor analysis for soil test data: a methodological approach in environment friendly soil fertility management

2007 ◽  
Vol 8 ◽  
pp. 8-19 ◽  
Author(s):  
Hari Dahal
Keyword(s):  
Principal Component Analysis ◽  
Factor Analysis ◽  
Soil Fertility ◽  
Test Data ◽  
Methodological Approach ◽  
Principal Component ◽  
Component Analysis ◽  
Soil Test ◽  
Soil Fertility Management ◽  
Fertility Management

Soil test data were used in factor analysis employing the Principal Component Analysis technique for the reduction and summarization of soil variables. Principal component analysis was found to be highly suggestive in analyzing soil test data on which a rational fertilizer nutrients recommendation can be made for a sustainable soil fertility management reign. The Journal of AGRICULTURE AND ENVIRONMENT Vol. 8, 2007, pp. 8-19

Field-scale variability of soil test phosphorus and other nutrients in grasslands under long-term agricultural managements

Soil Research ◽  
2013 ◽  
Vol 51 (6) ◽  
pp. 503 ◽  
Author(s):  
Weijun Fu ◽  
Keli Zhao ◽  
Peikun Jiang ◽  
Zhengqian Ye ◽  
Hubert Tunney ◽  
...  
Keyword(s):  
Soil Nutrients ◽  
Poultry Litter ◽  
Soil Nutrient ◽  
Statistical Correlation ◽  
Soil Test ◽  
Field Scale ◽  
The North ◽  
Positive Correlations ◽  
Soil Test Phosphorus

Field-scale variation of soil nutrients in grassland is becoming important because of the use of soil-nutrient information as a basis for policies such as the recently introduced EU Nitrates Directive. This study investigates the field-scale variability of soil-test phosphorus (STP) and other nutrients in two grasslands with a long-term history of poultry litter application. Two fields (field 1 for silage and field 2 for grazing pasture) were selected, and soil samples were collected based on 12 m by 12 m (field 1) and 15 m by 15 m (field 2) grids. Data were analysed using conventional statistics, geostatistics, and a geographic information system (GIS). In field 1, STP values ranged from 12.4 to 90 mg L–1 (average 38.5 mg L–1). In field 2, STP values ranged from 4.3 to 130.0 mg L–1 (average 21.4 mg L–1). Attention should be paid to long-term poultry application, as the average STP values in both fields were much greater than the recommended agronomic optimum STP status in Ireland of 8 mg L–1. Coefficient of variation values of soil nutrients in field 2 were much higher than those in field 1. Log-transformation and Box–Cox transformation were applied to achieve normality. Statistically significant (P < 0.01), positive correlations between P and other nutrients were found in both fields. Exponential and spherical models were fitted to the experimental variograms of STP in fields 1 and 2, respectively. Compared with the counterparts in field 1, soil nutrients in field 2 had larger ‘nugget-to-sill’ values, revealing that sheep grazing could weaken the spatial auto-correlation of soil nutrients. A grid of 60 m by 60 m was recommended for soil sampling in grassland, based on this study. High STP concentrations in field 1 were in the north-eastern side, which was related to uneven poultry litter application. Strong spatial similarity of low STP, magnesium, and pH values in their spatial distribution were found in field 2, confirming their strong statistical correlation.

scholarly journals Soil Fertility Management for Better Crop Production

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1349
Author(s):  
John Havlin ◽  
Ron Heiniger
Keyword(s):  
Soil Fertility ◽  
Crop Production ◽  
Management Practices ◽  
Nutrient Management ◽  
Root Zone ◽  
Nutrient Use Efficiency ◽  
Soil Nutrient ◽  
Crop Productivity ◽  
Soil Fertility Management ◽  
Fertility Management

Increasing crop productivity per unit of land area to meet future food and fiber demand increases both soil nutrient removal and the importance of replenishing soil fertility through efficient nutrient management practices. Significant progress in enhancing nutrient-use efficiency in production agriculture requires improved estimates of plant-available nutrients in the root zone, enhanced crop response to applied nutrients, and reduced offsite nutrient transport. This special issue, Soil Fertility Management for Better Crop Production, presents 15 manuscripts that advance our knowledge of interrelated soil, plant, and management factors important to increasing the nutrient availability and crop recovery of applied nutrients.

scholarly journals Low Soil Nutrient Tolerance and Mineral Fertilizer Response in White Guinea Yam (Dioscorea rotundata) Genotypes

2021 ◽  
Vol 12 ◽  
Author(s):  
Ryo Matsumoto ◽  
Haruki Ishikawa ◽  
Asrat Asfaw ◽  
Robert Asiedu
Keyword(s):  
West Africa ◽  
Soil Fertility ◽  
Soil Nutrients ◽  
Tuber Yield ◽  
Soil Nutrient ◽  
Mineral Fertilizer ◽  
Dry Weight ◽  
Nutrient Supply ◽  
Fertilizer Response ◽  
Guinea Yam

Yam (Dioscorea spp.) is a major food security crop for millions of resource-poor farmers, particularly in West Africa. Soil mineral deficiency is the main challenge in yam production, especially with the dwindling of fallow lands for the indigenous nutrient supply. Cultivars tolerant to available low soil nutrients and responsive to added nutrient supply are viable components of an integrated soil fertility management strategy for sustainable and productive yam farming systems in West Africa. This study’s objective was to identify white Guinea yam (D. rotundata) genotypes adapted to available low soil nutrients and responsive to externally added nutrient supply. Twenty advanced breeding lines and a local variety (Amula) were evaluated under contrasting soil fertility, low to expose the crop to available low soil nutrient supply and high to assess the crop response to added mineral fertilizer (NPK) input at Ibadan, Nigeria. The genotypes expressed differential yield response to low soil fertility (LF) stress and added fertilizer input. Soil fertility susceptibility index (SFSI) ranged from 0.64 to 1.34 for tuber yield and 0.60 to 1.30 for shoot dry weight. The genotypes R034, R041, R050, R052, R060, R100, and R125 combined lower SFSI with a low rate of reduction in tuber yield were identified as tolerant to LF stress related to the soil mineral deficiency. Likewise, the genotypes R109, R119, and R131 showed high susceptibility to soil fertility level and/or fertilizer response. Genotypes R025 and R034 had the tuber yielding potential twice of that the local variety under low soil nutrient conditions. Shoot dry weight and tuber yield showed a positive correlation both under low and high soil fertility conditions (r = 0.69 and 0.75, respectively), indicating the vigor biomass may be a morphological marker for selecting genotypes of white Guinea yam for higher tuber yield. Our results highlight genotypic variation in the tolerance to low soil nutrients and mineral fertilizer response in white Guinea yam to exploit through breeding and genetic studies to develop improved genotypes for low and high input production systems in West Africa.

scholarly journals Soil Nutrient Dynamics under Old and Young Cocoa, Coffee and Cashew Plantations at Uhonmora, Edo State, Nigeria

2015 ◽  
Vol 19 (2) ◽  
pp. 75 ◽  
Author(s):  
Rotimi Rufus Ipinmoroti ◽  
Joseph Sunday Ogeh
Keyword(s):  
Soil Fertility ◽  
Cover Crops ◽  
Nutrient Dynamics ◽  
Management Practices ◽  
Soil Nutrient ◽  
Soil Fertility Management ◽  
Total N ◽  
Nutrient Contents ◽  
Fertility Management ◽  
Edo State

A  study  was  conducted  to  assess  nutrient  dynamics  of  soils  under  old  and  young  cocoa,  coffee  and  cashew plantations and the leaf nutrient contents of the crops at Uhonmora, Edo State, Nigeria for proper cultural and soil fertility management of the plantations. Soil and crop leaf samples were collected from each plantation using a random sampling technique. The samples were analyzed using standard procedures for sand, silt, clay, pH (H2O), electrical conductivity (EC), total N, available P, K, Ca, Mg, Na, and Effective Cation Exchange Capacity (ECEC). Leaf samples were analyzed for N, P, K, Ca, Mg and Na. Data were compared with the corresponding soil and foliar critical nutrient values for each crop. Results indicated that the soils were texturally sandy clay loam and acidic. The soils varied in their nutrient contents, with soil P for the old cocoa, young coffee and cashew plantations far below critical values. The young cashew plot was low in N content but adequate for other plots. However, the soil ECEC increased with the increasing of calcium contents. Leaf N was below critical for all the crops. Leaf K was low for cocoa and coffee plants, leaf Ca was low for the young cashew plants, while leaf Mg was low for the young cocoa and old cashew. The high soil Mg/K ratio of 8.7- 22.3 as against the established value of 2.0 might have resulted in gross nutrient imbalance which must have affected the absorption and utilization of other nutrients. Hence, adequate soil N did not translate the same availability to the crops. The ECEC showed that the soil needs to be improved upon for sustainable  productivity.  Soil  nutrient  content  variation  across  the  plantations  with  age  of  establishment  will necessitate the need for consistent routine soil nutrient assessment for proper and balanced soil nutrient supply to the  crops,  for  healthy  crop  growth  and  optimum  yield.    Management  practices  of  soil  surface  mulching  using organic wastes and cover crops under compatible cropping systems are needed for successful plot establishment and better growth performance of the young seedlings.Key words: Nutrient dynamics, plantation crops, rehabilitation, soil fertility management [How to Cite: Rotimi RI and JS Ogeh. 2014. Soil Nutrient Dynamics under Old and Young Cocoa, Coffee and Cashew Plantations at Uhonmora, Edo State, Nigeria. J Trop Soils 19(2): 85-90. Doi: 10.5400/jts.2014.19.2.85] [Permalink/DOI: www.dx.doi.org/10.5400/jts.2014.19.2.85]     

scholarly journals Testing the accuracy of Soil Testing Kit® Transchem

Agro-Science ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 114-116
Author(s):  
S. Idris ◽  
A. Rilwan ◽  
S.A. Abubakar ◽  
M. Adamu ◽  
Y. Sadiq ◽  
...  
Keyword(s):  
Soil Nutrients ◽  
Soil Ph ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Fertilizer Application ◽  
Soil Testing ◽  
Soil Fertility Management ◽  
Soc Estimation ◽  
Significant Difference ◽  
Test Soil

Soil testing is key to soil fertility management as it serves as a fertilizer application guide to farmers, scientists and consultants. It gives information on soil nutrient status and its supplying capacity. Laboratory (LB) procedures have been the most reliable approach for soil nutrients analyses. However, it is costly and nonpoint. Thus, the use of in–situ testing kit emerges and becomes prominent. Notwithstanding, applicability of soil testing kit must be validated by laboratory test. This work aimed to examine the reliability/suitability of Soil Testing Kit® Transchem (SK) in determining selected soil nutrients in Sahel Savannah, Nigeria. Twentyfive replicate soil samples were collected from 12°47’86’’-12°20’96’’N and 4°38’37’’-4°188’02’’E, Kebbi State Nigeria and used to test soil pH, N, P, K and soil organic carbon (SOC) by SK and LB. The SK uses colour chart and comparator for rating nutrients status qualitatively into; low, medium and high and up to very high for P. The LB results were transformed to qualitative data by corresponding the values with soil rating standardinto low, medium and high. To perform statistics, weighting was done by assigning weight load to each category; low = 1, medium = 2 and high = 3. The two methods were compared using t-test, regression and descriptive analyses. Results showed non-significant difference between the two methods for soil contents of N, P and K. However, SK poorly estimated soil pH and SOC. Correlation and regression coefficients (r = 0.915 and R2 = 0.838, respectively) indicated reliability of the SK. It is concluded that SK can be reliably used for N, P, and K but not soil pH and SOC estimation for soils in Sahel savannah of Nigeria.

scholarly journals Evaluation of soil nutrient management practices of taro farmers in Taveuni, Fiji

2014 ◽  
Vol 32 (2) ◽  
pp. 61 ◽  
Author(s):  
Sofina Nisha ◽  
Surendra Prasad ◽  
Jagdish Bhati
Keyword(s):  
Soil Fertility ◽  
Management Practices ◽  
Nutrient Management ◽  
Low Cost ◽  
Soil Health ◽  
Soil Nutrient ◽  
Soil Fertility Management ◽  
Chemical Fertilizers ◽  
Fertility Status ◽  
Different Types

There is evidence that the soil health in Taveuni, Fiji is deteriorating over time threatening livelihoods of taro producers. The present study was conducted to understand the soil nutrient management practices followed by taro farmers in Taveuni. The study revealed that the farmers in Taveuni use various organic and chemical fertilizers and various other soil fertility management practices such as mulching, crop rotation with legumes, yagona and agroforestry. The quantity of nitrogen, phosphorous and potash (NPK) applied to taro crop on different types of soils was meager. The study further revealed that there was imbalanced and insufficient use of chemical fertilizers and organic sources of soil nutrients. The main cause of low use of fertilizers was that the farmers in Taveuni do not know the fertility status of their farms as no soil testing was ever done and majority of them are also not fully aware of various low-cost organic methods of maintaining soil fertility of farms.

Assessment of soil fertility management practices of wheat in western terai of Nepal

2018 ◽  
pp. 105-114
Author(s):  
N. Rawal ◽  
N. Bhandari ◽  
S. Subedi ◽  
D. R. Chalise ◽  
D. Khadka
Keyword(s):  
Soil Fertility ◽  
Management Practices ◽  
Soil Nutrient ◽  
Simple Random Sampling ◽  
Structured Interview ◽  
Wheat Crop ◽  
Soil Fertility Management ◽  
Animal Science ◽  
Fertility Management ◽  
Time Availability

A study was conducted to assess the soil fertility management practices and their constraints in sixty households of western terai of Nepal namely Barrohiya (Kapilvastu), Rehara (Rupandehi) and Sanda (Nawalparasi) in 2013 by using simple random sampling techniques. A semi-structured interview schedule was used for the collection of the data. Eighty percent of the interviewed farmers had medium land holding size (7.5 to 82 Katha). Most of the land was irrigated (>81 percent) and medium upland type (53.48 percent). Farmers in those areas weren’t practicing green manuring but were habituated to incorporate legumes (pea, lentil, black gram, beans, etc.). Chemical fertilizer was the main source of nutrient (56 percent) for wheat crop. Urea and DAP were commonly used by farmers whereas MoP was rarely used. Farmers of Kapilvastu applied the highest amount of Urea (165 Kg/ha) where as the amount of DAP (116.9 kg/ha) and MoP (27.8 Kg/ha) used was more in Nawalparasi than other two in wheat crop. On an average the farmers applied 13.3 kg/ha MoP which is very low as compared to recommended dose (41.7 kg/ha). There were number of constraints and obstacles perceived by the farmers. Arrangement must be made on those areas for time availability of fertilizers and farmers must be made aware about adequate use of quality chemical fertilizers and proper soil nutrient management.Journal of the Institute of Agriculture and Animal Science. Vol. 33-34, 2015, page: 105-114

scholarly journals Effects of Management Practices on Soil Nutrient Levels in Sabke Catchment Area, Nigeria

2016 ◽  
Vol 47 (2) ◽  
pp. 180
Author(s):  
S.A Mashi ◽  
A. Yaro
Keyword(s):  
Soil Fertility ◽  
Crop Production ◽  
Management Practices ◽  
Crop Residues ◽  
Soil Nutrient ◽  
Chemical Fertilizer ◽  
High Rate ◽  
Soil Fertility Management ◽  
Fertility Management ◽  
Residue Retention

In Nigeria’s drylands, profitable crop production requires adequate soil fertility management. This study examines the effects of farmer-managed practices on soil fertility in Sabke catchment of the drylands. Seven sites under permanent cropland, fallow land, grassland, shrubland, orchard land, intercropping land and woodland distributed on four transects were selected across the catchment. At every site, five replicate soil samples were collected from 0-15cm (topsoil) and 20-30cm (subsoil) and analysed for C, N, P, Ca, Mg, K and Na. Higher topsoil values of most of the properties were observed under cropland and intercropping sites. The two cultivated plots receive annual applications of organic manure in addition to chemical fertilizer and crops residue retention while the other plots are not. Thus, improvement in soil organic matter and nutrients would be expected in soils of the area with high rate of application of manure and chemical fertilizer, and retention of crop residues

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